<template>
  <el-container>
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt />
        <span>党费后台管理系统</span>
      </div>
      <el-button type="primary" plain @click="logout">退出</el-button>
    </el-header>
    <!-- 主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="togleCollapse">|||</div>
        <el-menu
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
          background-color=""
          text-color="#333"
          active-text-color="#409FFF"
          class="el-menu-vertical-demo"
        >
          <!-- :unique-opened="true"->只允许展开一个菜单 -->
          <!-- :collapse-transition="false" -> 关闭动画 -->
          <!-- router -> 导航开启路由模式 -->
          <!-- 一级菜单的模板区域 -->
          <template v-for="subItem in menuList">
            <el-menu-item
              v-if="subItem.children === null"
              :index="'/' + subItem.path"
              @click="saveNavState('/' + subItem.path)"
              :key="subItem.id"
            >
              <template slot="title">
                <i :class="iconObj[subItem.id]"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>

            <!-- 一级菜单  -->
            <el-submenu v-else :index="subItem.id + ''" :key="subItem.id">
              <!-- 一级菜单的模板区域 -->
              <template slot="title">
                <i :class="iconObj[subItem.id]"></i>
                <span>{{ subItem.authName }}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item
                :index="'/' + subItem.path"
                v-for="subItem in subItem.children"
                :key="subItem.id"
                @click="saveNavState('/' + subItem.path)"
              >
                <!-- 导航开启路由模式：
                将index值作为导航路由 -->
                <!-- 二级菜单的模板区域 -->
                <template slot="title">
                  <i class="el-icon-menu"></i>
                  <span>{{ subItem.authName }}</span>
                </template>
              </el-menu-item>
            </el-submenu>
          </template>
        </el-menu>
      </el-aside>
      <!-- 内容主体 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>

export default {

  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj: {
        1: "iconfont icon-tijikongjian",
        2: "iconfont icon-user",
        3: "iconfont icon-shangpin",
        4: "iconfont icon-danju",
        7: "iconfont icon-baobiao",
        8: "iconfont icon-morentouxiang",
        11: "iconfont icon-baobiao",
      },
      // 默认不折叠
      isCollapse: false,
      // 被激活导航地址
      activePath: "",
    };
  },
  
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    logout() {
      // 清空token
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    // 获取请求菜单
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      //if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res;
      console.log(res);
    },
    // 菜单的折叠与展开
    togleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // 保存连接的激活地址
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
    },
  },
};
</script>

<style lang="less" scoped>
.el-container {
  height: 100%;
}
.el-header {
  //background-color: #373f41;
  background: linear-gradient(to right, #409eff, #4cdafe) !important;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    img {
      height: 40px;
    }
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  //background-color: #333744;
  background-color: rgb(238, 241, 246);
  .el-menu {
    border: none;
  }
}
.el-main {
  background-color: #eaedf1;
  background-image: url("../assets/homeBk.jpg");
  background-size: cover; //全屏展示
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #1e90ff;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  // 鼠标放上去变成小手
  cursor: pointer;
}
</style>
